Interconnects

Vgmn

• functionality : a generic VCI compliant micro-network
• Mandatory arguments:
  • instance name
• Optional arguments:
  • min_latency
• Example:

  my_vgmn = Vgmn("my_vgmn", 10)
  

• Defined ports:
  • getBoth(), getInit() and getTarget(): local ports, allocated on demand

LocalCrossbar?

• functionality : a VCI compliant crossbar interconnect
• Mandatory arguments:
  • instance name
• Example:

  my_lc = LocalCrossbar("lc0")
  

• Defined ports:
  • getBoth(), getInit() and getTarget(): local ports, allocated on demand
  • upstream, bidirectional port to upper-level interconnect

VCI Initiators

Xcache

• functionality: a direct mapping cache controler (separated instruction & data cache)
• Mandatory arguments:
  • instance name
• Optional arguments:
  • dcache_lines : number of lines in data cache
  • dcache_words : number of words per line in data cache
  • icache_lines : number of lines in instruction cache
  • icache_words : number of words per line in instruction cache
• Example:

  my_cache = Xcache( "my_cache",
                     dcache_lines = 32,
                     dcache_words = 8,
                     icache_lines = 32,
                     icache_words = 8 )
  

• Defined ports:
  • cache: to the CPU cache port
  • vci: to the micro-network

Processors

Mips

• Functionality : a MIPS R3000 micro-processor
• Mandatory arguments:
  • name
• Example:

  my_proc = Mips("my_proc")
  

• Defined ports:
  • cache: to the cache's cache port
  • irq[n]: interrupt line (0 <= n < 6)

VCI Targets

MultiRam

• !Mandatory arguments:
  • name
• Optional arguments:
  • a list of segments, allocated with Segment()
• Example:

  my_ram = MultiRam("my_ram", seg1, seg2, seg3)
  

• Defined ports:
  • vci: to the micro-network

MultiTty

• functionality: a TTY controler (up to 256 TTYs)
• Mandatory arguments:
  • instance name
  • an ordered list ot names (one name per emulated terminal)
• Example:

  my_tty = MultiTty("my_tty_controler", "TTY0", "TTY1", "TT2")
  

• Defined ports:
  • vci: to the micro-network
  • irq[n]: interrupt line (0 <= n < nb of ttys)

Locks

• functionality : a locks controler
• Mandatory arguments:
  • instance name
• Example:

  my_locks = Locks("my_locks_controler")
  

• Defined ports:
  • vci: to the micro-network